Category: Disease
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Recommendations for Fall Treatments in Strawberry Crops with Known Presence of Neopest
Guido Schnabel, Clemson University; Phil Brannen, University of Georgia; and Bill Cline, North Carolina State University Whether or not Neopestalotiopsis will substantially harm your strawberries this season depends on many things, including the cultivar, sanitation practices, initial inoculum levels, weather conditions, the fungicides you apply, and application timing. This article focuses on chemical management options…
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Downy Mildew Found on Cucumber and Squash in Charleston
By Clemson Plant Pathologist Dr. Anthony Keinath Similar to 2023, cucurbit downy mildew was found at Coastal REC in mid-September, last Friday the 13th, on cucumber and butternut squash transplanted August 15. Interestingly, cucumbers transplanted about 2 weeks ago didn’t have downy mildew…yet. Symptoms on both cucumber and squash means that both strains of cucurbit downy…
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Fungus-Based Biological Control Agents: How Useful Are They for Strawberry Disease Management?
From Guido Schnabel, Jeffrey A. Hopkins, Jim Faust, and William Gura Biological control agents (BCAs) are being promoted for disease management in fruits, nuts, and vegetables but very little data is available about their efficacy especially when it comes to preharvest field performance. The Schnabel lab has investigated yeast-like fungi and true yeast BCAs, namely…
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Weekly Field Update – 8/26/24
Strawberry growers are scrambling to find disease-free plants. Late-season disease and insect pressure is picking up and muscadines and other fall crops are nearing harvest. See details below. Researchers from universities across the Southeast are seeking to expand the number of crops on the MyIPM app for Vegetables. In order to do this, feedback is…
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Weekly Field Update – 8/19/24
The Coastal and Pee Dee regions have been drying out from Tropical Storm Debby. Fall crops are being planted in many areas. Peach harvest is coming to a close and muscadine harvest will begin soon. Disease pressure has really kicked up. See details below. Growers may continue document any crop or infrastructure impacts from Tropical…
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Fruit Rots on Pumpkins, Gourds, and Winter Squashes
From Clemson Plant Pathologist Tony Keinath As part of a new grant on cucurbit anthracnose with the University of Georgia, we sampled 68 pumpkins, gourds, and winter squash from “cull piles” at 7 pumpkin patches and small farms in South Carolina in October, November, and December 2023. Two-thirds of the 10 types of cucurbits sampled…
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Stem Rot on Transplanted Tomato in March 2024
From Clemson Plant Pathologist Tony Keinath and Food Crops Agent Zack Snipes “Stem and root rot” is the term used to describe a disease on recently transplanted vegetable crops, like tomato, pepper, watermelon, cantaloupe, and cucumber. Tomato transplants with stem rot were observed last week along the coast of South Carolina. A proper diagnosis of…
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Damping-Off on Direct-Seeded and Transplanted Vegetable Crops
From Clemson Plant Pathologist Tony Keinath “Damping-off” refers to root and stem rot on young seedlings of direct-seeded crops. “Stem and root rot” is used to describe the same disease on transplanted crops. I will use the term “seedling disease” when information below applies to both types of crops. In South Carolina, the water mold…
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White Mold on Kale and Other Cool-Season Vegetables
From Clemson Plant Pathologist Tony Keinath Sclerotinia white mold, a cool-season disease on several different vegetable crops, is present on collard and (probably) on kale. It is particularly common on over-wintered crops. The white mold fungus has a complex life cycle. The fungus, Sclerotinia sclerotiorum, survives long-term and over the summer as sclerotia in soil.…
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Fungicide Sensitivity of Cucurbit Powdery Mildew in Charleston, SC
From Clemson Plant Pathologist Tony Keinath A fall fungicide sensitivity bioassay was done in October 2023, to find out which fungicides are most effective against powdery mildew on squash, watermelon, and other cucurbits. Methods: ‘Early Prolific’ yellow summer squash plants with three true leaves were treated with fungicides, water, or not treated. The following day,…
The South Carolina Grower 